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Recognised as Colour

#3F1528

  • #3F1528
  • Red
  • Dark
  • Nearest: Black

#3F1528 is a red with RGB values 63, 21, 40 and HSL 333°, 50%, 16%. It is a dark colour, so white text on it reaches 15.6:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#3F1528#3F1528
HEX#3F1528
RGBrgb(63, 21, 40)
RGB (0–1)0.2471, 0.0824, 0.1569
RGB percentages24.7%, 8.2%, 15.7%
HSLhsl(332.9, 50%, 16.5%)
HSV / HSBhsv(332.9, 66.7%, 24.7%)
CMYK0%, 66.7%, 36.5%, 75.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,134,184
CSS custom property--colour: #3F1528;

Brightness & contrast

Relative luminance0.01746WCAG 2.x, 0 is black and 1 is white
Perceived brightness40.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 15.56:1
Contrast with white15.56:1WCAG normal text: AAA
Contrast with black1.35:1WCAG normal text: Fail
Greyscale equivalent#1F1F1F
Inverted#C0EAD7

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#1B1F29no red cones; affects about 1% of men; ΔE 22.4 from the original
Deuteranopia#272727no green cones; the most common form, about 1% of men; ΔE 23.1 from the original
Tritanopia#44121Cno blue cones; rare, and affects men and women equally; ΔE 9.1 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text15.56:1WCAG large text: AAA
Contrast with black, large text1.35:1WCAG large text: Fail

Named colours

Black · ΔE 27Dim grey · ΔE 38.1Dark slate grey · ΔE 38.6Dark slateblue · ΔE 43Gray · ΔE 45.7Slate grey · ΔE 46.8
Nearest named CSS colourBlack (#000000)ΔE 26.98, a distinctly different colour
Hue familyred
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#153F2C
Analogous#3F153D, #3F1715
Triadic#283F15, #15283F
Split complementary#153F17, #153D3F
Tetradic#3D3F15, #153F2C, #17153F

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#C8588B
Lighter +30%#B23B71
Lighter +20%#8C2E59
Lighter +10%#652240
Darker −10%#190810
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#4A0A27
Less saturated −25%#351F29

Channel breakdown

R63
G21
B40
Red63 (24.7%)
Green21 (8.2%)
Blue40 (15.7%)
Hue332.86°
Saturation (HSL)50%
Lightness16.47%
Dominant channelRed
Hex per channelR 3F · G 15 · B 28

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Every value on this page was computed from “3f1528” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.